document.write("<nav class=\"navbar navbar-inverse\">\n" +
    "    <div class=\"container\">\n" +
    "        <!-- Brand and toggle get grouped for better mobile display -->\n" +
    "        <div class=\"navbar-header\">\n" +
    "            <button type=\"button\" class=\"navbar-toggle collapsed\" data-toggle=\"collapse\"\n" +
    "                    data-target=\"#bs-example-navbar-collapse-1\" aria-expanded=\"false\">\n" +
    "                <span class=\"sr-only\">Toggle navigation</span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "            </button>\n" +
    "            <a class=\"navbar-brand\" href=\"index.html\">天山商城</a>\n" +
    "        </div>\n" +
    "\n" +
    "        <!-- Collect the nav links, forms, and other content for toggling -->\n" +
    "        <div class=\"collapse navbar-collapse\" id=\"bs-example-navbar-collapse-1\">\n" +
    "            <ul class=\"nav navbar-nav\">\n" +
    "                <li class=\"active\"><a href=\"#\">精品 <span class=\"sr-only\">(current)</span></a></li>\n" +
    "            </ul>\n" +
    "            <form class=\"navbar-form navbar-left\">\n" +
    "                <div class=\"form-group\">\n" +
    "                    <input type=\"text\" class=\"form-control\" placeholder=\"热门搜索\">\n" +
    "                </div>\n" +
    "                <button type=\"submit\" class=\"btn btn-default\">搜索</button>\n" +
    "            </form>\n" +
    "            <ul class=\"nav navbar-nav navbar-right\">\n" +
    "                <li><a href=\"cart.html\">购物车</a></li>\n" +
    "                <li><a href=\"login.html\">登录</a></li>\n" +
    "                <li><a href=\"register.html\">注册</a></li>\n" +
    "                <li class=\"dropdown\">\n" +
    "                    <a href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\" role=\"button\" aria-haspopup=\"true\"\n" +
    "                       aria-expanded=\"false\">联系我们 <span class=\"caret\"></span></a>\n" +
    "                    <ul class=\"dropdown-menu\">\n" +
    "                        <li><a href=\"#\">公司介绍</a></li>\n" +
    "                        <li><a href=\"#\">Another action</a></li>\n" +
    "                        <li><a href=\"#\">Something else here</a></li>\n" +
    "                        <li role=\"separator\" class=\"divider\"></li>\n" +
    "                        <li><a href=\"#\">Separated link</a></li>\n" +
    "                    </ul>\n" +
    "                </li>\n" +
    "            </ul>\n" +
    "        </div><!-- /.navbar-collapse -->\n" +
    "    </div><!-- /.container-fluid -->\n" +
    "</nav>");